Shoe repairer&#39;s jack



Nov. 29, 1938. E. e. WOLF SHOE REPAIRER'S JACK Filed Feb. 23, 1938 INVENTOR 6/7? W ATTC DRNEY Patented Nov. 29, 1938 UNITED STATES PATENT OFFICE Machine Company, St.

tion of Missouri Louis, Mo.,. a corpora- Application February 23, 1938, Serial No. 192,052

10 Claims.

The invention relates to shoe jacks and more particularly to jacks of this type which are likely to be used in repairing shoes.

One type of jack used for such service includes 5 a support secured to the floor or bench, a jack carrier which is rotatable on the support, and a shoe hold-down strap for clamping the shoe to the last.

One object of the present invention is to facilitate the tightening and releasing of the holddown strap to provide a more secure clamping of the shoe to the last and to avoid unnecessary demand upon the operators time for adjusting the hold-down means.

Another object of the invention is to avoid undesirable movement of shoe parts on the last as the work is turned to difierent positions to accommodate the operator.

Other detail objects incidental or contributory 20 to this main object will appear from the following description, reference being had to the accompanying drawing illustrating the invention, in which- Figure l is an elevation of the complete jack showing a shoe mounted thereon.

Figure 2 is a view of the same structure looking towards the righthand side of Figure 1, the drawing being upon an enlarged scale with a part broken away.

Figure 3 is a vertical view and section the line 3-3 of Figure 2.

Figure 4 is a horizontal section taken on the line 4-4 of Figure 3.

The structure includes a stationary base I having a tubular upper extension 2. A tubular carrier 3 is rotatable on base I and extension 2, but has no movement longitudinally thereof, and carries an adapter 4 for a jack 5. A sleeve 6 surrounds carrier 3 which is slotted at 3a to receive a pin 6a on sleeve 6 whereby the sleeve is slidable lengthwise of the carrier but rotates therewith. The sleeve includes annular ribs I between which is journaled a split collar 8 slidable with sleeve 6 but held against rotation therewith by a bar 9 fixed to base I. A coiled spring I surrounds carrier 3 and yieldingly supports sleeve 6. A bracket II on collar 8 pivotally mounts a spring pressed pawl I2 and a pawl-releasing pedal I3. Bar 9 has a series of teeth I4 forming a ratchet cooperating with pawl l2 to hold bracket II and collar 8 and sleeve 6 against the thrust of spring II].

A hold-down strap I has its ends anchored to lugs I 6 on sleeve 6 and extends upwardly from the same over a shoe S posted on the jack. The 55 strap includes a buckle l'l whereby the length of taken on the strap may be adjusted roughly, but it will be understood that this adjustment will not be utilized in the normal operation of the jack.

To hold carrier 3 to the support without interiering with its rotation thereon, carrier 3 is pro- 5- vided with a rigid inner ring I8 having an upwardly facing edge I9 engaged by an annular hearing Zli, the upper edge of which is notched to seat a pin El adjustably anchored to base I by a bolt 22 and a nut 23 seated on a washer 24.

With the parts in the normal position indicated in Figure 3, the shoe may be applied to the last and the operator may apply pressure to pedal l3 (tilting the latter slightly in a clockwise direction to permit pawl I2 to function) thereby moving sleeve 6 and strap downwardly to the position shown in Figure 1 in which the shoe is clamped to the jack. The shoe S, last 5, carrier 3, strap I5, and sleeve 5 may be rotated as a. unit without twisting strap I5 about the jack. Such twisting is present in some earlier treadle operated jacks and tends to resist rotation of the last work and in such jacks if the operator uses sufficient force to rotate the last and work to the desired position, the strap is stretched and if a sole is being applied to the shoe it likely will be moved out of desired position. Also, the resistance mentioned makes it necessary for the operator to hold the last and work mounted thereon in the desired position, thereby interfering with 3&1.

the free use of his hands for tools and supplies.

When operations on the shoe are finished, pedal I3 is pressed in an anti-clockwise direc tion to release pawl I2 from ratchet teeth Hi, whereupon spring it} moves the sleeve and strap upwardly and the shoe may be removed from the jack.

The embodiment of the invention is not limited to the mechanical details illustrated and described, there being many obvious equivalents for these details. A friction or tilting-nut clamp could be substituted for the ratchet and pawl looking device. Spring I0 could be eliminated, thereby cheapening the structure and not substantially interfering with other advantages of the structure attending the rotation and sliding of the strap and its anchorage on the last carrier, although it might be necessary to manually raise the strap to remove and replace the shoe. The support could be mounted on a tilting base without afiecting the remainder of the structure, and various other changes in details may be made by those skilled in the art without departing from the spirit of the invention. The exclusive use of manipulating his such modifications as come within the scope of the claims is contemplated.

I claim:

1. A shoe jack comprising a support, a last carrier rotatable on said support, a shoe hold-down member rotatable with said carrier, and manually controlled means for tightening and releasing said member, said means being mounted on said support and being held against rotation thereon with said carrier.

2. A shoe jack comprising a support, a last carrier rotatable on said support, shoe hold-down means movable lengthwise of said carrier, and a manually operated device releasably securing said means longitudinally of said support, said carrier and hold-down means being rotatable about a vertical axis and relative to said support and device.

3. A shoe jack comprising a support, a last carrier shoe hold-down means movable lengthwise of said carrier relative to a last thereon to clamp a shoe to the last, said carrier and means being rotatable as a unit about the axis of said support,

and a non-rotatable device for moving said holddown means as described.

4. In a shoe jack, a support, a last carrier rotatable on saidsupport, a part slidable longitudinally of said support and carrier, shoe hold-down means anchored to said part, a spring thrusting said part towards a last on said carirer, and a device slidable on said support and having relatively rotatable engagement with said part for tightening said means against the thrust of said spring.

5. In a shoe jack, an upright support, a jack carrier rotatable on but held against longitudinal movement on said support, a sleeve slidable on said carrier and rotatable therewith, a shoe holding strap extending over the top of said carrier with its ends anchored to said sleeve, and a pedal device for moving said sleeve downwardly and constructed and arranged to maintain a given position radially of said support irrespective of rotation of said carrier and sleeve.

6. In a shoe jack, an upright support, a jack carrier rotatable on but held against longitudinal movement on said support, a sleeve slidable on said carrier and rotatable therewith, a shoe holding strap extending over the top of said carrier with its ends anchored to said sleeve, a spring thrusting said sleeve upwardly, and a pedal device for moving said sleeve downwardly against the thrust of said spring and constructed and ar ranged to maintain a given position radially of said support irrespective of rotation of said carrier and sleeve, there being a foot controlled means on said device for locking said pedal and sleeve in depressed position.

7. A shoe jack as described in claim 5 in which the support and pedal device include a ratchet and pawl automatically securing said device in a lowered position, said device also including a foot operated means for disengaging said ratchet and pawl.

8. In a shoe jack, an upright support, a jack carrier rotatable on but held against longitudinal movement on said support, a sleeve slidable on said carrier and rotatable therewith and having a radial projection, a shoe holding strap extending over the top of said carrier with its ends anchored to said sleeve, a collar. surrounding said sleeve and having annular engagement with said projection, a bracket on said collar engageable by the foot of the user to lower the bracket, collar, sleeve and strap, a pawl on said bracket, and downwardly facing ratchet teeth on said support engageable by said pawl, said pawl being releasable from said teeth by pressure of the users foot.

9. In a shoe jack, a base, a tubular upright fixed thereon, a tubular last carrier rotatably mounted on said base and upright, a sleeve slidably and rotatably mounted on said carrier, a spring surrounding said carrier and seated on said base and supporting said sleeve, a collar surrounding said sleeve, interengaging elements on said collar and sleeve preventing their relative axial movement and accommodating their relative rotation, interengaging elements on said base and collar preventing their relative rotation but accommodating sliding movement of said collar on said base. a bracket on said collar, a pawl pivoted on said bracket, downwardly facing elements on said base engageable by said pawl, a pedal pivoted on said bracket and engaging said pawl, when tilted, to disengage said elements.

10. In a hose jack, a base, an upright fixed thereon, a tubular last-carrier resting on said base and surrounding said upright, said carrier having an upwardly facing annular ledge, a downwardly facing ring opposing said ledge, adjustable means for thrusting said ring against said ledge to hold said carrier to said base while permitting its rotation thereon, a shoe hold-down ,member slidably mounted on said carrier and rotatable therewith, and a foot operable device mounted on said base for tightening and releasing said member independently of said means.

EUGENE G. WOLF. 

